Hello!
Thank you very much for your message!
Although I currently dedicate myself to creating plugins for RPG Maker MZ, I also spent a lot of time making games, which is why, although I'm familiar with the methods for executing most of the RPG Maker MZ commands through code instead of event functions, I like to maintain the base and ease of use of these features.
That's why, whenever I have the chance to include plugin commands that reduce the need to use things through code, I will do so, at least for things that are likely to be frequently used.
Knowing JS for RPG Maker MZ is very helpful, especially because it opens doors that were previously impossible to do without an ultra-long event due to the limitations of the program itself (for example, I hope someday they change the system of Conditions and Events, because being able to choose only one condition seems terrible to me, and having to put one condition, inside another condition, inside another, and so on, seems ridiculous when you could simply use the && or || operators))
What you mentioned, in fact, was one of the things I had planned to implement, but decided to leave for a future update of the plugin. So, I'm glad you mentioned it as well. I believe that will be a good way to further customize the expeditions.
I'm glad you find the plugin useful! Expeditions is, I believe, so far the longest plugin (at least in terms of the number of programmed lines) that I have made to date, and I hope more people can enjoy it!